Krishnamurthy, E. V., P. V. Sankar, S. K. Sen, M. Ranganathan, and K. S. N. Iyer. “ALWIN - Algorithmic Chemical Notation System for Organic Compounds. Part I: Acyclic Structures. ( Non-Conventional Methods in Document Retrieval. 16)”. Journal of Information and Knowledge, vol. 9, no. 4, Dec. 1972, pp. 523-4, doi:10.17821/srels/1972/v9i4/49263.